International Union of Pure and Applied Chemistry (IUPAC) Posted on September 15, 2011 by Men Yali Copyright Holders: International Union of Pure and Applied Chemistry (IUPAC) Self-archiving policy Conditions Accepted version: X Published version: √ Remarks: Authors may immediately deposit copies of their own articles online, for archival and distribution purposes, but only in the form of the IUPAC published pdf version. Verification Date: 29.12.2010